Lamp holder



Feb. 20, 1940. J. GLAss'BERG LAMP HOLDER Filed May 17, 1938 2Sheets-Sheetv l Feb. 2o, 1,940. GLASSBERG 2,190,834

LAMP HOLDER Y Filed May 1'17, 1938 2 Sheets-Sheet 2 ATTORNEY PatentedFeb. 20, 1940 UNITED STATES .Partnr ori-ics LAMP` HOLDER JacobGlassbergJ Hillside, Nul., assigner to Sam` son Investment Co., a`corporation of New Jersey Application May 17, 1938, Serial No. 2085382 1Claim.l

This inventionV relates to holders or sockets for incandescent lamps,and more particularly to a socket or holder located in` a predeterminedposition with respect to a lens, reflector, refractor or other opticaldevice. In one of its more specic aspects the invention is directed to aFigure 2is a cross-sectional view taken on line 2 2 of Figure l in thedirection of the arrows.

Figure 3 is a fragment of an enlarged cross-` sectional Viewillustrating the relationship and manner of connecting a contact to thesocketk chamber. r

Figure 4 is a top plan view of my improved holder.

Figure 5 is a cross-sectional view taken on line 5--5 of Figure 4.

Figure 6 is a plan View of the holder shown in Figure 5, but inverted.

Figure 7 is a vertical cross-sectional view of the holder and lamp base.

Figure 8 is a View in perspective of the lamp, base, holder and contactterminal, one above the other.

As shown `in the drawings, there is a lamp chamber or housing I0 open atthe top and bottom so that a lamp I may be inserted therethrough. Thelamp I is a prefocused lamp and maycomprise an envelope 2, a lament 3,and a base 4. Secured to the base are a pair of outwardly extendingarcuate wings or lugs 5 and li.

The radius of the outer periphery of the wings i are equal, but thelength of the arc of the outer periphery of the wings are dissimilar.The wings 5 and 6 are located at a predetermined distance and in apredetermined plane with respect to the filament 3, and bear the sameangular relation to the filament, so one lamp may be replaced by` `faceof ring I4.

of the housing I2 is greater than the outside diameter of the envelopeof the lamp I. The interior of the housing l2 has a cylindrical recessextending from its 1bottom edge up to a point located an appreciabledistance from said edge and defines a downwardly facing annular hat`shoulder i3 perpendicular to the axis of the chamber' I2.

A contact and locating annulus or ring I4 of Conducting materialhas alocating notch or slot ll:

l5 in the outer periphery thereof. The outside diameter of the ring i4is slightly less than the outside diameter of the shoulder I3. Theringifi is located in said chamber I2 and its upper V face is held inabutting relation with shoulderl' I3 by stud bolts It whose conicalheads are located in countersinks and above the lower flat The chamberIZhas an elongated locating and positioning slot or recess Il thereinextending upwardly from the shoulder gg I3 and this slot or recess Ilbears a predetermined relationship with respect to a lens or otheroptical device which may be supported by chamber It. The ring I4 is sodisposed on the shoulder I3 that the notch or slot I5 is in alignmentwith 25 the elongated slot Il in chamber I2 and the cross-sectionaldimensions of the latter are slightly greater than the correspondingdimensions of the former. `The inside diameter of the ring I4 isapproximately the same as the inside diameter of shoulder I3. A studbolt I8 carrying a conductor I9 from a source of electric energy extendsthrough the housing l2 and into the contact I4 to make electricalconnection therewith.

As shown inFigures 4, 5, 6 and 8 there is a holder comprising a flatannulus or ring conductor 2i) having an upwardly extending key or lug 2lintegral therewith at its outer periphery. The `cross-sectionaldimensions of the key 2| 40 are slightly less than the correspondingdimensions of the locating notch or slot I5, and the length of said key2| is less than the length of recess I'I so that the key maypassupwardly through notch I5 and into the recess II.

The ouside diameter of ring 20 may be slightly less than the outsidediameter of shoulder i3 and its inside diameter is just slightly greaterthan the cylindrical base l of the lamp I so that the same may passtherethrough. A rigid and thin short cylinder 22 having an outwardlyextending flange 23 and an inwardly extending flange 2li is ccaxiallydisposed relative to the ring 20 and is rigidly secured thereto byrivets-passing through the ring 2li and iiange 23. The outside 55diameter of the cylinder 22 is slightly less than the inside diameter ofthe ring I4 so that the same may be located in the opening of ring I4.The inside diameter of the ange 24 is the same as the inside diameter ofthe ring 2U, and the inside diameter of the cylinder 22 is slightlygreater than the corresponding dimension between the wings and 5 of thebase of the lamp. A pair of unequal openings 25. and 26 are cut out ofthe flange 24 and are of approximately the same size as the wings on thelamp I, with the opening 25 being narrower than wing 6, and are spacedfrom. each other as are saidwings so that the lamp may be insertedtherein in one way only. And the openings are always located in the sameand in a predetermined relationship with respect to the key 2 I. Struckout of said annular ring 2e are a pair of retaining or locking strips 27`whose free ends 28 are bent upwardly and extend into slots or openings29 in the flange 24. That portion of each strip under one extremity ofthe wing shaped openings in flange 24 is inclined gradually upward tothe lower face of ilange 24 then extends along said lower face and iscontiguous therewith from the cam or incline portion thereof to theshort upwardly projecting portion of stop 28 which extends through theslot 29.

lThe shape of the upper face of ,each spring retaining or locking strip2l are complements of the lower faces of the wings and the innerextremities of the strips 21 may be spaced a slight distance from theinner face of cylinder 22 so that the downwardly curved outer portion ofthe wings may make a snug fit therebetween.

The position of the stops with respect to the key 2l is always the sameand predetermined in order that the position of `the filament of thelamp may always be the samey with respect to Q the key 2l andconsequently with respect to the optical device.

The holder unit may be readily secured in the chamber I2 by insertingthe key 2I through the opening I5 in the contact ring I4 and up into theelongated recess Il in the side of the chamber.

The holder unit is forced upwardly until the upper face of the annularmember 23 abuts against the under face of the contact annulus Ml. And,in this position, the cylinder 22 is located in the central openingv ofthe annular member I4.

A sleeve 3d is located in the chamber I2! and may be demountable or maybe keyed to the chamber and maintains the holder unit in a xed positionagainst annular member I4. A closure plug 3I having a contact member 32secured thereto makes electrical connection between the end terminal ofthe lamp and the ring 33, connected to a conducting wire 34 by bolt 35.Besides having the advantage of ready assembly with a supportingstructure, it is apparent that even an unskilled workman must properlyposition the same and lamp may be replaced without disturbing an elementother than the removal of the burned-out lamp.

When it is desired to mount the lamp in the chamber, the lamp with basedown is inserted through the top of the chamber and the base extendsythrough the opening of the holder, the lamp is rotated until the wings 5and 6 are located in the openings 25 and 2B. The lamp is further rotatedand upon rotation the wings ride up along the cam portions of the locksprings 2l and as they reach the under face of flange 24 cause thespring to be forced away from the flange 24 and this rotation iscontinued until the leading edges of the wings 5 and 6 strike the` stops28 to locate the lamp in a predetermined position. lamp in this fixedposition. When it is desired to remove the lamp, the operator insertshis hand through the top of the chamber and counter rotates the lamp toremove the wings from between the spring retainers and the ange 24 andlocate the Wings in the openings in the flange 24 whereby the lamp maybe withdrawn therefrom and a new lamp may be substituted therefor(Although, the invention has been described in detail, it is not to belimited thereby because it is subject to changes and modications withinits scope.

I claim:

An incandescent lamp holder comprising an annular conducting member, alug secured thereto adjacent the outer periphery thereof and extendingupwardly therefrom, a collar secured to said annular member, a angeextending inwardly from said collar and spaced from said annular member,said ange havinga pair of unequally spaced openings therein, a pair ofresilient retaining strips rstruck out of said an nular member andnormally exerting force in a direction therefrom and towards saidiiange, and a pair of stops located between said member and said flange.

JACOB GLASSBERG.

The springs 2l maintain the

